CARFIX

NGK Iridium Spark Plug

NGK Spark Plugs — NGK Iridium Spark Plug — part number ILFR5T11

NGK Spark Plugs · Part number ILFR5T11 · NZ$53.00 incl. GST

For your trusty Japanese daily driver or family SUV, like a Toyota Camry, RAV4, or Lexus RX, spark plugs are the unsung heroes of your engine, delivering that crucial spark to ignite the fuel-air mix for a smooth, efficient ride. This NGK option is a top-notch, OEM-grade choice.

Price

NZ$53.00 including GST. Part number ILFR5T11.

Fits these vehicles

Description

Spark Plugs: Your Engine's Best Mates — Featuring NGK
> Righto, let's talk spark plugs. These little beauties are precision-engineered to kickstart your engine, firing off that high-voltage spark to ignite the fuel-air mix. But over time, they get a bit knackered — think electrode erosion, carbon build-up, and insulator wear. When that happens, you'll start noticing misfires, a rough idle, and your petrol bill creeping up. This is especially true for Toyota's super-efficient 2.5L four-cylinder engines in the Camry and RAV4, which rely on spot-on ignition timing for their legendary fuel economy. Don't let your ride feel sluggish; let's get it sorted!

Symptoms That Led You Here
• Engine misfires or stumbling under acceleration
• Rough or uneven idle, especially when cold
• Noticeable drop in fuel economy (common complaint in Camry/RAV4 owners)
• Check engine light illuminated (often P0300-P0304 misfire codes)
• Difficulty starting, particularly in damp NZ winter mornings
• Sluggish throttle response during highway merging

Will it pass WOF?
Spark plugs themselves aren't a direct WOF inspection item, however the symptoms of worn plugs—excessive exhaust emissions, rough running, and potential catalytic converter damage from unburnt fuel—can cause WOF failure. NZ's emissions visual check may flag vehicles running excessively rich due to incomplete combustion from degraded spark plugs.

DIY or Workshop?
Difficulty: 4/10 for most Toyota/Lexus applications
Estimated time: 45-90 minutes depending on engine configuration
Tools required: 10mm socket, spark plug socket (16mm typically for these applications), torque wrench, extension bar, anti-seize compound, gap gauge

The inline-four engines in the Camry and RAV4 offer straightforward top-access to spark plugs. The FJ Cruiser's V6 requires slightly more patience due to coil-on-plug positioning. Always replace plugs on a cold engine and torque to manufacturer specification (typically 18-25 Nm for aluminium heads).

Expert Recommendation
Bob and the CARFIX team recommend replacing spark plugs at 80,000-100,000km intervals for iridium/platinum types, or sooner if you're experiencing any misfiring symptoms. NGK has been Toyota's OEM supplier for decades, making this ILFR5T11 an excellent factory-equivalent choice for your Camry, RAV4, or Lexus RX.

Bob @ CARFIX is always on hand to help you work out exactly what spark plug grade and gap specification you need for your Toyota or Lexus. Make sure you head over to Bob's Shop for a chat!

Fitment Notes
• Confirm engine code before ordering—the 2AR-FE (Camry/RAV4) and 1GR-FE (FJ Cruiser) have different plug specifications
• Lexus RX 270 uses the same 2.7L platform as some RAV4 variants but verify part number
• Jeep Compass MultiAir turbocharged engines may require specific heat range—double-check application
• Toyota Alphard/Vellfire V6 models require six plugs; budget accordingly
• Pre-gapped plugs should still be verified before installation

---

🛠️ Bob's Pro Tip: Do the Job Right!
> If you're replacing this spark plug, make sure you've got the right workshop prep, protection, and safety gear ready. Taking a bit of extra time and using the proper safety stands and cleaners makes all the difference for a professional result!

🧰 What Else You'll Need:
• Safety First: Always secure your vehicle on heavy-duty safety jack stands before working underneath. Never rely solely on a hydraulic jack.
• Clean Hands: Keep a pack of Nitrile Gloves handy to protect your skin from grease, oils, and chemical sprays.
• Preparation: Have microfibre towels and a suitable parts cleaner nearby to keep components clean during installation.